html {
    width: 100%;
    height: 100%;
    /* 对横向内容溢出隐藏 */
    overflow-x: hidden;
}

body {
    text-align: left;
    width: 100%;
    overflow: hidden;
    background-color: #e9dfc7;
}

p {
    font-size: 18px;
    text-align: center;
}

ul {
    list-style: none;
}

.top-nav,
.btm-nav,
.nav-panel {
    display: none;
}

.m-read-content {
    font-size: 14px;
    color: #555;
    line-height: 31px;
    padding: 15px;
}

.m-read-content h4 {
    font-size: 20px;
    color: #736357;
    border-bottom: solid 1px #736357;
    /* 设置字符间距 */
    letter-spacing: 2px;
    margin-bottom: 1em;
}

.m-read-content p {
    /* 设置段落缩进 */
    text-indent: 2em;
    margin: 0.5 em 0;
    letter-spacing: 0px;
    line-height: 24px;
}

.u-tab {
    height: 34px;
    margin: 10px auto;
    line-height: 34px;
    border-radius: 8px;
    border: 1px solid #858382;
    font-size: 12px;
    background-color: #000;
    opacity: 0.9;
}

.m-button-bar {
    width: 70%;
    max-width: 800px;
    padding: 5px;
    margin: 0 auto;
}


/* c3逻辑是1开始 */

.u-tab li:nth-child(2) {
    border-right: none;
}

.u-tab li {
    list-style: none;
    display: inline-block;
    width: 49%;
    border-right: 1px solid #858382;
    text-align: center;
    color: #fff;
}

.container .top-nav {
    position: fixed;
    top: 0;
    height: 50px;
    width: 100%;
    z-index: 99;
    background-color: #000;
}

.container .top-nav .icon-back {
    position: absolute;
    top: 14px;
    left: 18px;
    width: 23px;
    height: 23px;
    font-size: 30px;
    color: #fff;
}

.nav-tittle {
    position: absolute;
    top: 16px;
    left: 42px;
    color: #fff;
}

.container .btm-nav {
    position: fixed;
    bottom: 0;
    /* top: 200px; */
    width: 100%;
    height: 70px;
    z-index: 99;
    background-color: #000;
}

.container .btm-nav ul {
    display: flex;
    justify-content: space-around;
}

.container .btm-nav ul li {
    position: relative;
    top: 15px;
    display: inline-block;
    color: #fff;
    text-align: center;
}

.container .btm-nav ul li i {
    font-size: 20px;
}

.container .btm-nav ul li .icon-font {
    font-size: 10px !important;
}

.container .nav-panel {
    position: fixed;
    bottom: 70px;
    height: 135px;
    width: 100%;
    background-color: #000;
}

.container .nav-panel ul li {
    display: inline-block;
    margin: 15px 10px;
}

.nav-panel-tittle {
    color: #fff;
}

.btn {
    background: none;
    border: 1px #8c8c8c solid;
    padding: 5px 40px;
    color: #fff;
    display: inline-block;
    border-radius: 16px;
}

.back-color {
    position: relative;
    height: 30px;
    width: 30px;
    background: #fff;
    border-radius: 15px;
    display: inline-block;
    vertical-align: -14px;
    border: 1px transparent solid;
    /* margin-left: 10px; */
}


/* .back-color:active {
    border: 1px #ff7800 solid;
} */